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Diffstat (limited to 'binutils-2.25/gas/symbols.c')
| -rw-r--r-- | binutils-2.25/gas/symbols.c | 3252 |
1 files changed, 3252 insertions, 0 deletions
diff --git a/binutils-2.25/gas/symbols.c b/binutils-2.25/gas/symbols.c new file mode 100644 index 00000000..67fc84bb --- /dev/null +++ b/binutils-2.25/gas/symbols.c @@ -0,0 +1,3252 @@ +/* symbols.c -symbol table- + Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, + 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, + 2011, 2012 Free Software Foundation, Inc. + + This file is part of GAS, the GNU Assembler. + + GAS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + GAS is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with GAS; see the file COPYING. If not, write to the Free + Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA + 02110-1301, USA. */ + +/* #define DEBUG_SYMS / * to debug symbol list maintenance. */ + +#include "as.h" +#include "safe-ctype.h" +#include "obstack.h" /* For "symbols.h" */ +#include "subsegs.h" +#include "struc-symbol.h" + +/* This is non-zero if symbols are case sensitive, which is the + default. */ +int symbols_case_sensitive = 1; + +#ifndef WORKING_DOT_WORD +extern int new_broken_words; +#endif + +/* symbol-name => struct symbol pointer */ +static struct hash_control *sy_hash; + +/* Table of local symbols. */ +static struct hash_control *local_hash; + +/* Below are commented in "symbols.h". */ +symbolS *symbol_rootP; +symbolS *symbol_lastP; +symbolS abs_symbol; +symbolS dot_symbol; + +#ifdef DEBUG_SYMS +#define debug_verify_symchain verify_symbol_chain +#else +#define debug_verify_symchain(root, last) ((void) 0) +#endif + +#define DOLLAR_LABEL_CHAR '\001' +#define LOCAL_LABEL_CHAR '\002' + +#ifndef TC_LABEL_IS_LOCAL +#define TC_LABEL_IS_LOCAL(name) 0 +#endif + +struct obstack notes; +#ifdef TE_PE +/* The name of an external symbol which is + used to make weak PE symbol names unique. */ +const char * an_external_name; +#endif + +static char *save_symbol_name (const char *); +static void fb_label_init (void); +static long dollar_label_instance (long); +static long fb_label_instance (long); + +static void print_binary (FILE *, const char *, expressionS *); + +/* Return a pointer to a new symbol. Die if we can't make a new + symbol. Fill in the symbol's values. Add symbol to end of symbol + chain. + + This function should be called in the general case of creating a + symbol. However, if the output file symbol table has already been + set, and you are certain that this symbol won't be wanted in the + output file, you can call symbol_create. */ + +symbolS * +symbol_new (const char *name, segT segment, valueT valu, fragS *frag) +{ + symbolS *symbolP = symbol_create (name, segment, valu, frag); + + /* Link to end of symbol chain. */ + { + extern int symbol_table_frozen; + if (symbol_table_frozen) + abort (); + } + symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP); + + return symbolP; +} + +/* Save a symbol name on a permanent obstack, and convert it according + to the object file format. */ + +static char * +save_symbol_name (const char *name) +{ + unsigned int name_length; + char *ret; + + name_length = strlen (name) + 1; /* +1 for \0. */ + obstack_grow (¬es, name, name_length); + ret = (char *) obstack_finish (¬es); + +#ifdef tc_canonicalize_symbol_name + ret = tc_canonicalize_symbol_name (ret); +#endif + + if (! symbols_case_sensitive) + { + char *s; + + for (s = ret; *s != '\0'; s++) + *s = TOUPPER (*s); + } + + return ret; +} + +symbolS * +symbol_create (const char *name, /* It is copied, the caller can destroy/modify. */ + segT segment, /* Segment identifier (SEG_<something>). */ + valueT valu, /* Symbol value. */ + fragS *frag /* Associated fragment. */) +{ + char *preserved_copy_of_name; + symbolS *symbolP; + + preserved_copy_of_name = save_symbol_name (name); + + symbolP = (symbolS *) obstack_alloc (¬es, sizeof (symbolS)); + + /* symbol must be born in some fixed state. This seems as good as any. */ + memset (symbolP, 0, sizeof (symbolS)); + + symbolP->bsym = bfd_make_empty_symbol (stdoutput); + if (symbolP->bsym == NULL) + as_fatal ("bfd_make_empty_symbol: %s", bfd_errmsg (bfd_get_error ())); + S_SET_NAME (symbolP, preserved_copy_of_name); + + S_SET_SEGMENT (symbolP, segment); + S_SET_VALUE (symbolP, valu); + symbol_clear_list_pointers (symbolP); + + symbolP->sy_frag = frag; + + obj_symbol_new_hook (symbolP); + +#ifdef tc_symbol_new_hook + tc_symbol_new_hook (symbolP); +#endif + + return symbolP; +} + + +/* Local symbol support. If we can get away with it, we keep only a + small amount of information for local symbols. */ + +static symbolS *local_symbol_convert (struct local_symbol *); + +/* Used for statistics. */ + +static unsigned long local_symbol_count; +static unsigned long local_symbol_conversion_count; + +/* This macro is called with a symbol argument passed by reference. + It returns whether this is a local symbol. If necessary, it + changes its argument to the real symbol. */ + +#define LOCAL_SYMBOL_CHECK(s) \ + (s->sy_flags.sy_local_symbol \ + ? (local_symbol_converted_p ((struct local_symbol *) s) \ + ? (s = local_symbol_get_real_symbol ((struct local_symbol *) s), \ + 0) \ + : 1) \ + : 0) + +/* Create a local symbol and insert it into the local hash table. */ + +struct local_symbol * +local_symbol_make (const char *name, segT section, valueT val, fragS *frag) +{ + char *name_copy; + struct local_symbol *ret; + + ++local_symbol_count; + + name_copy = save_symbol_name (name); + + ret = (struct local_symbol *) obstack_alloc (¬es, sizeof *ret); + ret->lsy_flags.sy_local_symbol = 1; + ret->lsy_flags.sy_resolved = 0; + ret->lsy_name = name_copy; + ret->lsy_section = section; + local_symbol_set_frag (ret, frag); + ret->lsy_value = val; + + hash_jam (local_hash, name_copy, (void *) ret); + + return ret; +} + +/* Convert a local symbol into a real symbol. Note that we do not + reclaim the space used by the local symbol. */ + +static symbolS * +local_symbol_convert (struct local_symbol *locsym) +{ + symbolS *ret; + + gas_assert (locsym->lsy_flags.sy_local_symbol); + if (local_symbol_converted_p (locsym)) + return local_symbol_get_real_symbol (locsym); + + ++local_symbol_conversion_count; + + ret = symbol_new (locsym->lsy_name, locsym->lsy_section, locsym->lsy_value, + local_symbol_get_frag (locsym)); + + if (local_symbol_resolved_p (locsym)) + ret->sy_flags.sy_resolved = 1; + + /* Local symbols are always either defined or used. */ + ret->sy_flags.sy_used = 1; + +#ifdef TC_LOCAL_SYMFIELD_CONVERT + TC_LOCAL_SYMFIELD_CONVERT (locsym, ret); +#endif + + symbol_table_insert (ret); + + local_symbol_mark_converted (locsym); + local_symbol_set_real_symbol (locsym, ret); + + hash_jam (local_hash, locsym->lsy_name, NULL); + + return ret; +} + +static void +define_sym_at_dot (symbolS *symbolP) +{ + symbolP->sy_frag = frag_now; + S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); + S_SET_SEGMENT (symbolP, now_seg); +} + +/* We have just seen "<name>:". + Creates a struct symbol unless it already exists. + + Gripes if we are redefining a symbol incompatibly (and ignores it). */ + +symbolS * +colon (/* Just seen "x:" - rattle symbols & frags. */ + const char *sym_name /* Symbol name, as a cannonical string. */ + /* We copy this string: OK to alter later. */) +{ + register symbolS *symbolP; /* Symbol we are working with. */ + + /* Sun local labels go out of scope whenever a non-local symbol is + defined. */ + if (LOCAL_LABELS_DOLLAR + && !bfd_is_local_label_name (stdoutput, sym_name)) + dollar_label_clear (); + +#ifndef WORKING_DOT_WORD + if (new_broken_words) + { + struct broken_word *a; + int possible_bytes; + fragS *frag_tmp; + char *frag_opcode; + + if (now_seg == absolute_section) + { + as_bad (_("cannot define symbol `%s' in absolute section"), sym_name); + return NULL; + } + + possible_bytes = (md_short_jump_size + + new_broken_words * md_long_jump_size); + + frag_tmp = frag_now; + frag_opcode = frag_var (rs_broken_word, + possible_bytes, + possible_bytes, + (relax_substateT) 0, + (symbolS *) broken_words, + (offsetT) 0, + NULL); + + /* We want to store the pointer to where to insert the jump + table in the fr_opcode of the rs_broken_word frag. This + requires a little hackery. */ + while (frag_tmp + && (frag_tmp->fr_type != rs_broken_word + || frag_tmp->fr_opcode)) + frag_tmp = frag_tmp->fr_next; + know (frag_tmp); + frag_tmp->fr_opcode = frag_opcode; + new_broken_words = 0; + + for (a = broken_words; a && a->dispfrag == 0; a = a->next_broken_word) + a->dispfrag = frag_tmp; + } +#endif /* WORKING_DOT_WORD */ + +#ifdef obj_frob_colon + obj_frob_colon (sym_name); +#endif + + if ((symbolP = symbol_find (sym_name)) != 0) + { + S_CLEAR_WEAKREFR (symbolP); +#ifdef RESOLVE_SYMBOL_REDEFINITION + if (RESOLVE_SYMBOL_REDEFINITION (symbolP)) + return symbolP; +#endif + /* Now check for undefined symbols. */ + if (LOCAL_SYMBOL_CHECK (symbolP)) + { + struct local_symbol *locsym = (struct local_symbol *) symbolP; + + if (locsym->lsy_section != undefined_section + && (local_symbol_get_frag (locsym) != frag_now + || locsym->lsy_section != now_seg + || locsym->lsy_value != frag_now_fix ())) + { + as_bad (_("symbol `%s' is already defined"), sym_name); + return symbolP; + } + + locsym->lsy_section = now_seg; + local_symbol_set_frag (locsym, frag_now); + locsym->lsy_value = frag_now_fix (); + } + else if (!(S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP)) + || S_IS_COMMON (symbolP) + || S_IS_VOLATILE (symbolP)) + { + if (S_IS_VOLATILE (symbolP)) + { + symbolP = symbol_clone (symbolP, 1); + S_SET_VALUE (symbolP, 0); + S_CLEAR_VOLATILE (symbolP); + } + if (S_GET_VALUE (symbolP) == 0) + { + define_sym_at_dot (symbolP); +#ifdef N_UNDF + know (N_UNDF == 0); +#endif /* if we have one, it better be zero. */ + + } + else + { + /* There are still several cases to check: + + A .comm/.lcomm symbol being redefined as initialized + data is OK + + A .comm/.lcomm symbol being redefined with a larger + size is also OK + + This only used to be allowed on VMS gas, but Sun cc + on the sparc also depends on it. */ + + if (((!S_IS_DEBUG (symbolP) + && (!S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP)) + && S_IS_EXTERNAL (symbolP)) + || S_GET_SEGMENT (symbolP) == bss_section) + && (now_seg == data_section + || now_seg == bss_section + || now_seg == S_GET_SEGMENT (symbolP))) + { + /* Select which of the 2 cases this is. */ + if (now_seg != data_section) + { + /* New .comm for prev .comm symbol. + + If the new size is larger we just change its + value. If the new size is smaller, we ignore + this symbol. */ + if (S_GET_VALUE (symbolP) + < ((unsigned) frag_now_fix ())) + { + S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); + } + } + else + { + /* It is a .comm/.lcomm being converted to initialized + data. */ + define_sym_at_dot (symbolP); + } + } + else + { +#if (!defined (OBJ_AOUT) && !defined (OBJ_MAYBE_AOUT) \ + && !defined (OBJ_BOUT) && !defined (OBJ_MAYBE_BOUT)) + static const char *od_buf = ""; +#else + char od_buf[100]; + od_buf[0] = '\0'; + if (OUTPUT_FLAVOR == bfd_target_aout_flavour) + sprintf (od_buf, "%d.%d.", + S_GET_OTHER (symbolP), + S_GET_DESC (symbolP)); +#endif + as_bad (_("symbol `%s' is already defined as \"%s\"/%s%ld"), + sym_name, + segment_name (S_GET_SEGMENT (symbolP)), + od_buf, + (long) S_GET_VALUE (symbolP)); + } + } /* if the undefined symbol has no value */ + } + else + { + /* Don't blow up if the definition is the same. */ + if (!(frag_now == symbolP->sy_frag + && S_GET_VALUE (symbolP) == frag_now_fix () + && S_GET_SEGMENT (symbolP) == now_seg)) + { + as_bad (_("symbol `%s' is already defined"), sym_name); + symbolP = symbol_clone (symbolP, 0); + define_sym_at_dot (symbolP); + } + } + + } + else if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, sym_name)) + { + symbolP = (symbolS *) local_symbol_make (sym_name, now_seg, + (valueT) frag_now_fix (), + frag_now); + } + else + { + symbolP = symbol_new (sym_name, now_seg, (valueT) frag_now_fix (), + frag_now); + + symbol_table_insert (symbolP); + } + + if (mri_common_symbol != NULL) + { + /* This symbol is actually being defined within an MRI common + section. This requires special handling. */ + if (LOCAL_SYMBOL_CHECK (symbolP)) + symbolP = local_symbol_convert ((struct local_symbol *) symbolP); + symbolP->sy_value.X_op = O_symbol; + symbolP->sy_value.X_add_symbol = mri_common_symbol; + symbolP->sy_value.X_add_number = S_GET_VALUE (mri_common_symbol); + symbolP->sy_frag = &zero_address_frag; + S_SET_SEGMENT (symbolP, expr_section); + symbolP->sy_flags.sy_mri_common = 1; + } + +#ifdef tc_frob_label + tc_frob_label (symbolP); +#endif +#ifdef obj_frob_label + obj_frob_label (symbolP); +#endif + + return symbolP; +} + +/* Die if we can't insert the symbol. */ + +void +symbol_table_insert (symbolS *symbolP) +{ + register const char *error_string; + + know (symbolP); + know (S_GET_NAME (symbolP)); + + if (LOCAL_SYMBOL_CHECK (symbolP)) + { + error_string = hash_jam (local_hash, S_GET_NAME (symbolP), + (void *) symbolP); + if (error_string != NULL) + as_fatal (_("inserting \"%s\" into symbol table failed: %s"), + S_GET_NAME (symbolP), error_string); + return; + } + + if ((error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (void *) symbolP))) + { + as_fatal (_("inserting \"%s\" into symbol table failed: %s"), + S_GET_NAME (symbolP), error_string); + } /* on error */ +} + +/* If a symbol name does not exist, create it as undefined, and insert + it into the symbol table. Return a pointer to it. */ + +symbolS * +symbol_find_or_make (const char *name) +{ + register symbolS *symbolP; + + symbolP = symbol_find (name); + + if (symbolP == NULL) + { + if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, name)) + { + symbolP = md_undefined_symbol ((char *) name); + if (symbolP != NULL) + return symbolP; + + symbolP = (symbolS *) local_symbol_make (name, undefined_section, + (valueT) 0, + &zero_address_frag); + return symbolP; + } + + symbolP = symbol_make (name); + + symbol_table_insert (symbolP); + } /* if symbol wasn't found */ + + return (symbolP); +} + +symbolS * +symbol_make (const char *name) +{ + symbolS *symbolP; + + /* Let the machine description default it, e.g. for register names. */ + symbolP = md_undefined_symbol ((char *) name); + + if (!symbolP) + symbolP = symbol_new (name, undefined_section, (valueT) 0, &zero_address_frag); + + return (symbolP); +} + +symbolS * +symbol_clone (symbolS *orgsymP, int replace) +{ + symbolS *newsymP; + asymbol *bsymorg, *bsymnew; + + /* Make sure we never clone the dot special symbol. */ + gas_assert (orgsymP != &dot_symbol); + + /* Running local_symbol_convert on a clone that's not the one currently + in local_hash would incorrectly replace the hash entry. Thus the + symbol must be converted here. Note that the rest of the function + depends on not encountering an unconverted symbol. */ + if (LOCAL_SYMBOL_CHECK (orgsymP)) + orgsymP = local_symbol_convert ((struct local_symbol *) orgsymP); + bsymorg = orgsymP->bsym; + + newsymP = (symbolS *) obstack_alloc (¬es, sizeof (*newsymP)); + *newsymP = *orgsymP; + bsymnew = bfd_make_empty_symbol (bfd_asymbol_bfd (bsymorg)); + if (bsymnew == NULL) + as_fatal ("bfd_make_empty_symbol: %s", bfd_errmsg (bfd_get_error ())); + newsymP->bsym = bsymnew; + bsymnew->name = bsymorg->name; + bsymnew->flags = bsymorg->flags & ~BSF_SECTION_SYM; + bsymnew->section = bsymorg->section; + bfd_copy_private_symbol_data (bfd_asymbol_bfd (bsymorg), bsymorg, + bfd_asymbol_bfd (bsymnew), bsymnew); + +#ifdef obj_symbol_clone_hook + obj_symbol_clone_hook (newsymP, orgsymP); +#endif + +#ifdef tc_symbol_clone_hook + tc_symbol_clone_hook (newsymP, orgsymP); +#endif + + if (replace) + { + if (symbol_rootP == orgsymP) + symbol_rootP = newsymP; + else if (orgsymP->sy_previous) + { + orgsymP->sy_previous->sy_next = newsymP; + orgsymP->sy_previous = NULL; + } + if (symbol_lastP == orgsymP) + symbol_lastP = newsymP; + else if (orgsymP->sy_next) + orgsymP->sy_next->sy_previous = newsymP; + + /* Symbols that won't be output can't be external. */ + S_CLEAR_EXTERNAL (orgsymP); + orgsymP->sy_previous = orgsymP->sy_next = orgsymP; + debug_verify_symchain (symbol_rootP, symbol_lastP); + + symbol_table_insert (newsymP); + } + else + { + /* Symbols that won't be output can't be external. */ + S_CLEAR_EXTERNAL (newsymP); + newsymP->sy_previous = newsymP->sy_next = newsymP; + } + + return newsymP; +} + +/* Referenced symbols, if they are forward references, need to be cloned + (without replacing the original) so that the value of the referenced + symbols at the point of use . */ + +#undef symbol_clone_if_forward_ref +symbolS * +symbol_clone_if_forward_ref (symbolS *symbolP, int is_forward) +{ + if (symbolP && !LOCAL_SYMBOL_CHECK (symbolP)) + { + symbolS *add_symbol = symbolP->sy_value.X_add_symbol; + symbolS *op_symbol = symbolP->sy_value.X_op_symbol; + + if (symbolP->sy_flags.sy_forward_ref) + is_forward = 1; + + if (is_forward) + { + /* assign_symbol() clones volatile symbols; pre-existing expressions + hold references to the original instance, but want the current + value. Just repeat the lookup. */ + if (add_symbol && S_IS_VOLATILE (add_symbol)) + add_symbol = symbol_find_exact (S_GET_NAME (add_symbol)); + if (op_symbol && S_IS_VOLATILE (op_symbol)) + op_symbol = symbol_find_exact (S_GET_NAME (op_symbol)); + } + + /* Re-using sy_resolving here, as this routine cannot get called from + symbol resolution code. */ + if ((symbolP->bsym->section == expr_section + || symbolP->sy_flags.sy_forward_ref) + && !symbolP->sy_flags.sy_resolving) + { + symbolP->sy_flags.sy_resolving = 1; + add_symbol = symbol_clone_if_forward_ref (add_symbol, is_forward); + op_symbol = symbol_clone_if_forward_ref (op_symbol, is_forward); + symbolP->sy_flags.sy_resolving = 0; + } + + if (symbolP->sy_flags.sy_forward_ref + || add_symbol != symbolP->sy_value.X_add_symbol + || op_symbol != symbolP->sy_value.X_op_symbol) + { + if (symbolP != &dot_symbol) + { + symbolP = symbol_clone (symbolP, 0); + symbolP->sy_flags.sy_resolving = 0; + } + else + { + symbolP = symbol_temp_new_now (); +#ifdef tc_new_dot_label + tc_new_dot_label (symbolP); +#endif + } + } + + symbolP->sy_value.X_add_symbol = add_symbol; + symbolP->sy_value.X_op_symbol = op_symbol; + } + + return symbolP; +} + +symbolS * +symbol_temp_new (segT seg, valueT ofs, fragS *frag) +{ + return symbol_new (FAKE_LABEL_NAME, seg, ofs, frag); +} + +symbolS * +symbol_temp_new_now (void) +{ + return symbol_temp_new (now_seg, frag_now_fix (), frag_now); +} + +symbolS * +symbol_temp_make (void) +{ + return symbol_make (FAKE_LABEL_NAME); +} + +/* Implement symbol table lookup. + In: A symbol's name as a string: '\0' can't be part of a symbol name. + Out: NULL if the name was not in the symbol table, else the address + of a struct symbol associated with that name. */ + +symbolS * +symbol_find_exact (const char *name) +{ + return symbol_find_exact_noref (name, 0); +} + +symbolS * +symbol_find_exact_noref (const char *name, int noref) +{ + struct local_symbol *locsym; + symbolS* sym; + + locsym = (struct local_symbol *) hash_find (local_hash, name); + if (locsym != NULL) + return (symbolS *) locsym; + + sym = ((symbolS *) hash_find (sy_hash, name)); + + /* Any references to the symbol, except for the reference in + .weakref, must clear this flag, such that the symbol does not + turn into a weak symbol. Note that we don't have to handle the + local_symbol case, since a weakrefd is always promoted out of the + local_symbol table when it is turned into a weak symbol. */ + if (sym && ! noref) + S_CLEAR_WEAKREFD (sym); + + return sym; +} + +symbolS * +symbol_find (const char *name) +{ + return symbol_find_noref (name, 0); +} + +symbolS * +symbol_find_noref (const char *name, int noref) +{ +#ifdef tc_canonicalize_symbol_name + { + char *copy; + size_t len = strlen (name) + 1; + + copy = (char *) alloca (len); + memcpy (copy, name, len); + name = tc_canonicalize_symbol_name (copy); + } +#endif + + if (! symbols_case_sensitive) + { + char *copy; + const char *orig; + unsigned char c; + + orig = name; + name = copy = (char *) alloca (strlen (name) + 1); + + while ((c = *orig++) != '\0') + { + *copy++ = TOUPPER (c); + } + *copy = '\0'; + } + + return symbol_find_exact_noref (name, noref); +} + +/* Once upon a time, symbols were kept in a singly linked list. At + least coff needs to be able to rearrange them from time to time, for + which a doubly linked list is much more convenient. Loic did these + as macros which seemed dangerous to me so they're now functions. + xoxorich. */ + +/* Link symbol ADDME after symbol TARGET in the chain. */ + +void +symbol_append (symbolS *addme, symbolS *target, + symbolS **rootPP, symbolS **lastPP) +{ + if (LOCAL_SYMBOL_CHECK (addme)) + abort (); + if (target != NULL && LOCAL_SYMBOL_CHECK (target)) + abort (); + + if (target == NULL) + { + know (*rootPP == NULL); + know (*lastPP == NULL); + addme->sy_next = NULL; + addme->sy_previous = NULL; + *rootPP = addme; + *lastPP = addme; + return; + } /* if the list is empty */ + + if (target->sy_next != NULL) + { + target->sy_next->sy_previous = addme; + } + else + { + know (*lastPP == target); + *lastPP = addme; + } /* if we have a next */ + + addme->sy_next = target->sy_next; + target->sy_next = addme; + addme->sy_previous = target; + + debug_verify_symchain (symbol_rootP, symbol_lastP); +} + +/* Set the chain pointers of SYMBOL to null. */ + +void +symbol_clear_list_pointers (symbolS *symbolP) +{ + if (LOCAL_SYMBOL_CHECK (symbolP)) + abort (); + symbolP->sy_next = NULL; + symbolP->sy_previous = NULL; +} + +/* Remove SYMBOLP from the list. */ + +void +symbol_remove (symbolS *symbolP, symbolS **rootPP, symbolS **lastPP) +{ + if (LOCAL_SYMBOL_CHECK (symbolP)) + abort (); + + if (symbolP == *rootPP) + { + *rootPP = symbolP->sy_next; + } /* if it was the root */ + + if (symbolP == *lastPP) + { + *lastPP = symbolP->sy_previous; + } /* if it was the tail */ + + if (symbolP->sy_next != NULL) + { + symbolP->sy_next->sy_previous = symbolP->sy_previous; + } /* if not last */ + + if (symbolP->sy_previous != NULL) + { + symbolP->sy_previous->sy_next = symbolP->sy_next; + } /* if not first */ + + debug_verify_symchain (*rootPP, *lastPP); +} + +/* Link symbol ADDME before symbol TARGET in the chain. */ + +void +symbol_insert (symbolS *addme, symbolS *target, + symbolS **rootPP, symbolS **lastPP ATTRIBUTE_UNUSED) +{ + if (LOCAL_SYMBOL_CHECK (addme)) + abort (); + if (LOCAL_SYMBOL_CHECK (target)) + abort (); + + if (target->sy_previous != NULL) + { + target->sy_previous->sy_next = addme; + } + else + { + know (*rootPP == target); + *rootPP = addme; + } /* if not first */ + + addme->sy_previous = target->sy_previous; + target->sy_previous = addme; + addme->sy_next = target; + + debug_verify_symchain (*rootPP, *lastPP); +} + +void +verify_symbol_chain (symbolS *rootP, symbolS *lastP) +{ + symbolS *symbolP = rootP; + + if (symbolP == NULL) + return; + + for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP)) + { + gas_assert (symbolP->bsym != NULL); + gas_assert (symbolP->sy_flags.sy_local_symbol == 0); + gas_assert (symbolP->sy_next->sy_previous == symbolP); + } + + gas_assert (lastP == symbolP); +} + +#ifdef OBJ_COMPLEX_RELC + +static int +use_complex_relocs_for (symbolS * symp) +{ + switch (symp->sy_value.X_op) + { + case O_constant: + return 0; + + case O_symbol: + case O_symbol_rva: + case O_uminus: + case O_bit_not: + case O_logical_not: + if ( (S_IS_COMMON (symp->sy_value.X_add_symbol) + || S_IS_LOCAL (symp->sy_value.X_add_symbol)) + && + (S_IS_DEFINED (symp->sy_value.X_add_symbol) + && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section)) + return 0; + break; + + case O_multiply: + case O_divide: + case O_modulus: + case O_left_shift: + case O_right_shift: + case O_bit_inclusive_or: + case O_bit_or_not: + case O_bit_exclusive_or: + case O_bit_and: + case O_add: + case O_subtract: + case O_eq: + case O_ne: + case O_lt: + case O_le: + case O_ge: + case O_gt: + case O_logical_and: + case O_logical_or: + + if ( (S_IS_COMMON (symp->sy_value.X_add_symbol) + || S_IS_LOCAL (symp->sy_value.X_add_symbol)) + && + (S_IS_COMMON (symp->sy_value.X_op_symbol) + || S_IS_LOCAL (symp->sy_value.X_op_symbol)) + + && S_IS_DEFINED (symp->sy_value.X_add_symbol) + && S_IS_DEFINED (symp->sy_value.X_op_symbol) + && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section + && S_GET_SEGMENT (symp->sy_value.X_op_symbol) != expr_section) + return 0; + break; + + default: + break; + } + return 1; +} +#endif + +static void +report_op_error (symbolS *symp, symbolS *left, operatorT op, symbolS *right) +{ + char *file; + unsigned int line; + segT seg_left = left ? S_GET_SEGMENT (left) : 0; + segT seg_right = S_GET_SEGMENT (right); + const char *opname; + + switch (op) + { + default: + abort (); + return; + + case O_uminus: opname = "-"; break; + case O_bit_not: opname = "~"; break; + case O_logical_not: opname = "!"; break; + case O_multiply: opname = "*"; break; + case O_divide: opname = "/"; break; + case O_modulus: opname = "%"; break; + case O_left_shift: opname = "<<"; break; + case O_right_shift: opname = ">>"; break; + case O_bit_inclusive_or: opname = "|"; break; + case O_bit_or_not: opname = "|~"; break; + case O_bit_exclusive_or: opname = "^"; break; + case O_bit_and: opname = "&"; break; + case O_add: opname = "+"; break; + case O_subtract: opname = "-"; break; + case O_eq: opname = "=="; break; + case O_ne: opname = "!="; break; + case O_lt: opname = "<"; break; + case O_le: opname = "<="; break; + case O_ge: opname = ">="; break; + case O_gt: opname = ">"; break; + case O_logical_and: opname = "&&"; break; + case O_logical_or: opname = "||"; break; + } + + if (expr_symbol_where (symp, &file, &line)) + { + if (left) + as_bad_where (file, line, + _("invalid operands (%s and %s sections) for `%s'"), + seg_left->name, seg_right->name, opname); + else + as_bad_where (file, line, + _("invalid operand (%s section) for `%s'"), + seg_right->name, opname); + } + else + { + const char *sname = S_GET_NAME (symp); + + if (left) + as_bad (_("invalid operands (%s and %s sections) for `%s' when setting `%s'"), + seg_left->name, seg_right->name, opname, sname); + else + as_bad (_("invalid operand (%s section) for `%s' when setting `%s'"), + seg_right->name, opname, sname); + } +} + +/* Resolve the value of a symbol. This is called during the final + pass over the symbol table to resolve any symbols with complex + values. */ + +valueT +resolve_symbol_value (symbolS *symp) +{ + int resolved; + valueT final_val = 0; + segT final_seg; + + if (LOCAL_SYMBOL_CHECK (symp)) + { + struct local_symbol *locsym = (struct local_symbol *) symp; + + final_val = locsym->lsy_value; + if (local_symbol_resolved_p (locsym)) + return final_val; + + final_val += local_symbol_get_frag (locsym)->fr_address / OCTETS_PER_BYTE; + + if (finalize_syms) + { + locsym->lsy_value = final_val; + local_symbol_mark_resolved (locsym); + } + + return final_val; + } + + if (symp->sy_flags.sy_resolved) + { + if (symp->sy_value.X_op == O_constant) + return (valueT) symp->sy_value.X_add_number; + else + return 0; + } + + resolved = 0; + final_seg = S_GET_SEGMENT (symp); + + if (symp->sy_flags.sy_resolving) + { + if (finalize_syms) + as_bad (_("symbol definition loop encountered at `%s'"), + S_GET_NAME (symp)); + final_val = 0; + resolved = 1; + } +#ifdef OBJ_COMPLEX_RELC + else if (final_seg == expr_section + && use_complex_relocs_for (symp)) + { + symbolS * relc_symbol = NULL; + char * relc_symbol_name = NULL; + + relc_symbol_name = symbol_relc_make_expr (& symp->sy_value); + + /* For debugging, print out conversion input & output. */ +#ifdef DEBUG_SYMS + print_expr (& symp->sy_value); + if (relc_symbol_name) + fprintf (stderr, "-> relc symbol: %s\n", relc_symbol_name); +#endif + + if (relc_symbol_name != NULL) + relc_symbol = symbol_new (relc_symbol_name, undefined_section, + 0, & zero_address_frag); + + if (relc_symbol == NULL) + { + as_bad (_("cannot convert expression symbol %s to complex relocation"), + S_GET_NAME (symp)); + resolved = 0; + } + else + { + symbol_table_insert (relc_symbol); + + /* S_CLEAR_EXTERNAL (relc_symbol); */ + if (symp->bsym->flags & BSF_SRELC) + relc_symbol->bsym->flags |= BSF_SRELC; + else + relc_symbol->bsym->flags |= BSF_RELC; + /* symp->bsym->flags |= BSF_RELC; */ + copy_symbol_attributes (symp, relc_symbol); + symp->sy_value.X_op = O_symbol; + symp->sy_value.X_add_symbol = relc_symbol; + symp->sy_value.X_add_number = 0; + resolved = 1; + } + + final_seg = undefined_section; + goto exit_dont_set_value; + } +#endif + else + { + symbolS *add_symbol, *op_symbol; + offsetT left, right; + segT seg_left, seg_right; + operatorT op; + int move_seg_ok; + + symp->sy_flags.sy_resolving = 1; + + /* Help out with CSE. */ + add_symbol = symp->sy_value.X_add_symbol; + op_symbol = symp->sy_value.X_op_symbol; + final_val = symp->sy_value.X_add_number; + op = symp->sy_value.X_op; + + switch (op) + { + default: + BAD_CASE (op); + break; + + case O_absent: + final_val = 0; + /* Fall through. */ + + case O_constant: + final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE; + if (final_seg == expr_section) + final_seg = absolute_section; + /* Fall through. */ + + case O_register: + resolved = 1; + break; + + case O_symbol: + case O_symbol_rva: + left = resolve_symbol_value (add_symbol); + seg_left = S_GET_SEGMENT (add_symbol); + if (finalize_syms) + symp->sy_value.X_op_symbol = NULL; + + do_symbol: + if (S_IS_WEAKREFR (symp)) + { + gas_assert (final_val == 0); + if (S_IS_WEAKREFR (add_symbol)) + { + gas_assert (add_symbol->sy_value.X_op == O_symbol + && add_symbol->sy_value.X_add_number == 0); + add_symbol = add_symbol->sy_value.X_add_symbol; + gas_assert (! S_IS_WEAKREFR (add_symbol)); + symp->sy_value.X_add_symbol = add_symbol; + } + } + + if (symp->sy_flags.sy_mri_common) + { + /* This is a symbol inside an MRI common section. The + relocation routines are going to handle it specially. + Don't change the value. */ + resolved = symbol_resolved_p (add_symbol); + break; + } + + if (finalize_syms && final_val == 0) + { + if (LOCAL_SYMBOL_CHECK (add_symbol)) + add_symbol = local_symbol_convert ((struct local_symbol *) + add_symbol); + copy_symbol_attributes (symp, add_symbol); + } + + /* If we have equated this symbol to an undefined or common + symbol, keep X_op set to O_symbol, and don't change + X_add_number. This permits the routine which writes out + relocation to detect this case, and convert the + relocation to be against the symbol to which this symbol + is equated. */ + if (! S_IS_DEFINED (add_symbol) +#if defined (OBJ_COFF) && defined (TE_PE) + || S_IS_WEAK (add_symbol) +#endif + || S_IS_COMMON (add_symbol)) + { + if (finalize_syms) + { + symp->sy_value.X_op = O_symbol; + symp->sy_value.X_add_symbol = add_symbol; + symp->sy_value.X_add_number = final_val; + /* Use X_op_symbol as a flag. */ + symp->sy_value.X_op_symbol = add_symbol; + } + final_seg = seg_left; + final_val = 0; + resolved = symbol_resolved_p (add_symbol); + symp->sy_flags.sy_resolving = 0; + goto exit_dont_set_value; + } + else if (finalize_syms + && ((final_seg == expr_section && seg_left != expr_section) + || symbol_shadow_p (symp))) + { + /* If the symbol is an expression symbol, do similarly + as for undefined and common syms above. Handles + "sym +/- expr" where "expr" cannot be evaluated + immediately, and we want relocations to be against + "sym", eg. because it is weak. */ + symp->sy_value.X_op = O_symbol; + symp->sy_value.X_add_symbol = add_symbol; + symp->sy_value.X_add_number = final_val; + symp->sy_value.X_op_symbol = add_symbol; + final_seg = seg_left; + final_val += symp->sy_frag->fr_address + left; + resolved = symbol_resolved_p (add_symbol); + symp->sy_flags.sy_resolving = 0; + goto exit_dont_set_value; + } + else + { + final_val += symp->sy_frag->fr_address + left; + if (final_seg == expr_section || final_seg == undefined_section) + final_seg = seg_left; + } + + resolved = symbol_resolved_p (add_symbol); + if (S_IS_WEAKREFR (symp)) + goto exit_dont_set_value; + break; + + case O_uminus: + case O_bit_not: + case O_logical_not: + left = resolve_symbol_value (add_symbol); + seg_left = S_GET_SEGMENT (add_symbol); + + /* By reducing these to the relevant dyadic operator, we get + !S -> S == 0 permitted on anything, + -S -> 0 - S only permitted on absolute + ~S -> S ^ ~0 only permitted on absolute */ + if (op != O_logical_not && seg_left != absolute_section + && finalize_syms) + report_op_error (symp, NULL, op, add_symbol); + + if (final_seg == expr_section || final_seg == undefined_section) + final_seg = absolute_section; + + if (op == O_uminus) + left = -left; + else if (op == O_logical_not) + left = !left; + else + left = ~left; + + final_val += left + symp->sy_frag->fr_address; + + resolved = symbol_resolved_p (add_symbol); + break; + + case O_multiply: + case O_divide: + case O_modulus: + case O_left_shift: + case O_right_shift: + case O_bit_inclusive_or: + case O_bit_or_not: + case O_bit_exclusive_or: + case O_bit_and: + case O_add: + case O_subtract: + case O_eq: + case O_ne: + case O_lt: + case O_le: + case O_ge: + case O_gt: + case O_logical_and: + case O_logical_or: + left = resolve_symbol_value (add_symbol); + right = resolve_symbol_value (op_symbol); + seg_left = S_GET_SEGMENT (add_symbol); + seg_right = S_GET_SEGMENT (op_symbol); + + /* Simplify addition or subtraction of a constant by folding the + constant into X_add_number. */ + if (op == O_add) + { + if (seg_right == absolute_section) + { + final_val += right; + goto do_symbol; + } + else if (seg_left == absolute_section) + { + final_val += left; + add_symbol = op_symbol; + left = right; + seg_left = seg_right; + goto do_symbol; + } + } + else if (op == O_subtract) + { + if (seg_right == absolute_section) + { + final_val -= right; + goto do_symbol; + } + } + + move_seg_ok = 1; + /* Equality and non-equality tests are permitted on anything. + Subtraction, and other comparison operators are permitted if + both operands are in the same section. Otherwise, both + operands must be absolute. We already handled the case of + addition or subtraction of a constant above. This will + probably need to be changed for an object file format which + supports arbitrary expressions, such as IEEE-695. */ + if (!(seg_left == absolute_section + && seg_right == absolute_section) + && !(op == O_eq || op == O_ne) + && !((op == O_subtract + || op == O_lt || op == O_le || op == O_ge || op == O_gt) + && seg_left == seg_right + && (seg_left != undefined_section + || add_symbol == op_symbol))) + { + /* Don't emit messages unless we're finalizing the symbol value, + otherwise we may get the same message multiple times. */ + if (finalize_syms) + report_op_error (symp, add_symbol, op, op_symbol); + /* However do not move the symbol into the absolute section + if it cannot currently be resolved - this would confuse + other parts of the assembler into believing that the + expression had been evaluated to zero. */ + else + move_seg_ok = 0; + } + + if (move_seg_ok + && (final_seg == expr_section || final_seg == undefined_section)) + final_seg = absolute_section; + + /* Check for division by zero. */ + if ((op == O_divide || op == O_modulus) && right == 0) + { + /* If seg_right is not absolute_section, then we've + already issued a warning about using a bad symbol. */ + if (seg_right == absolute_section && finalize_syms) + { + char *file; + unsigned int line; + + if (expr_symbol_where (symp, &file, &line)) + as_bad_where (file, line, _("division by zero")); + else + as_bad (_("division by zero when setting `%s'"), + S_GET_NAME (symp)); + } + + right = 1; + } + + switch (symp->sy_value.X_op) + { + case O_multiply: left *= right; break; + case O_divide: left /= right; break; + case O_modulus: left %= right; break; + case O_left_shift: left <<= right; break; + case O_right_shift: left >>= right; break; + case O_bit_inclusive_or: left |= right; break; + case O_bit_or_not: left |= ~right; break; + case O_bit_exclusive_or: left ^= right; break; + case O_bit_and: left &= right; break; + case O_add: left += right; break; + case O_subtract: left -= right; break; + case O_eq: + case O_ne: + left = (left == right && seg_left == seg_right + && (seg_left != undefined_section + || add_symbol == op_symbol) + ? ~ (offsetT) 0 : 0); + if (symp->sy_value.X_op == O_ne) + left = ~left; + break; + case O_lt: left = left < right ? ~ (offsetT) 0 : 0; break; + case O_le: left = left <= right ? ~ (offsetT) 0 : 0; break; + case O_ge: left = left >= right ? ~ (offsetT) 0 : 0; break; + case O_gt: left = left > right ? ~ (offsetT) 0 : 0; break; + case O_logical_and: left = left && right; break; + case O_logical_or: left = left || right; break; + default: abort (); + } + + final_val += symp->sy_frag->fr_address + left; + if (final_seg == expr_section || final_seg == undefined_section) + { + if (seg_left == undefined_section + || seg_right == undefined_section) + final_seg = undefined_section; + else if (seg_left == absolute_section) + final_seg = seg_right; + else + final_seg = seg_left; + } + resolved = (symbol_resolved_p (add_symbol) + && symbol_resolved_p (op_symbol)); + break; + + case O_big: + case O_illegal: + /* Give an error (below) if not in expr_section. We don't + want to worry about expr_section symbols, because they + are fictional (they are created as part of expression + resolution), and any problems may not actually mean + anything. */ + break; + } + + symp->sy_flags.sy_resolving = 0; + } + + if (finalize_syms) + S_SET_VALUE (symp, final_val); + +exit_dont_set_value: + /* Always set the segment, even if not finalizing the value. + The segment is used to determine whether a symbol is defined. */ + S_SET_SEGMENT (symp, final_seg); + + /* Don't worry if we can't resolve an expr_section symbol. */ + if (finalize_syms) + { + if (resolved) + symp->sy_flags.sy_resolved = 1; + else if (S_GET_SEGMENT (symp) != expr_section) + { + as_bad (_("can't resolve value for symbol `%s'"), + S_GET_NAME (symp)); + symp->sy_flags.sy_resolved = 1; + } + } + + return final_val; +} + +static void resolve_local_symbol (const char *, void *); + +/* A static function passed to hash_traverse. */ + +static void +resolve_local_symbol (const char *key ATTRIBUTE_UNUSED, void *value) +{ + if (value != NULL) + resolve_symbol_value ((symbolS *) value); +} + +/* Resolve all local symbols. */ + +void +resolve_local_symbol_values (void) +{ + hash_traverse (local_hash, resolve_local_symbol); +} + +/* Obtain the current value of a symbol without changing any + sub-expressions used. */ + +int +snapshot_symbol (symbolS **symbolPP, valueT *valueP, segT *segP, fragS **fragPP) +{ + symbolS *symbolP = *symbolPP; + + if (LOCAL_SYMBOL_CHECK (symbolP)) + { + struct local_symbol *locsym = (struct local_symbol *) symbolP; + + *valueP = locsym->lsy_value; + *segP = locsym->lsy_section; + *fragPP = local_symbol_get_frag (locsym); + } + else + { + expressionS exp = symbolP->sy_value; + + if (!symbolP->sy_flags.sy_resolved && exp.X_op != O_illegal) + { + int resolved; + + if (symbolP->sy_flags.sy_resolving) + return 0; + symbolP->sy_flags.sy_resolving = 1; + resolved = resolve_expression (&exp); + symbolP->sy_flags.sy_resolving = 0; + if (!resolved) + return 0; + + switch (exp.X_op) + { + case O_constant: + case O_register: + if (!symbol_equated_p (symbolP)) + break; + /* Fall thru. */ + case O_symbol: + case O_symbol_rva: + symbolP = exp.X_add_symbol; + break; + default: + return 0; + } + } + + *symbolPP = symbolP; + *valueP = exp.X_add_number; + *segP = symbolP->bsym->section; + *fragPP = symbolP->sy_frag; + + if (*segP == expr_section) + switch (exp.X_op) + { + case O_constant: *segP = absolute_section; break; + case O_register: *segP = reg_section; break; + default: break; + } + } + + return 1; +} + +/* Dollar labels look like a number followed by a dollar sign. Eg, "42$". + They are *really* local. That is, they go out of scope whenever we see a + label that isn't local. Also, like fb labels, there can be multiple + instances of a dollar label. Therefor, we name encode each instance with + the instance number, keep a list of defined symbols separate from the real + symbol table, and we treat these buggers as a sparse array. */ + +static long *dollar_labels; +static long *dollar_label_instances; +static char *dollar_label_defines; +static unsigned long dollar_label_count; +static unsigned long dollar_label_max; + +int +dollar_label_defined (long label) +{ + long *i; + + know ((dollar_labels != NULL) || (dollar_label_count == 0)); + + for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) + if (*i == label) + return dollar_label_defines[i - dollar_labels]; + + /* If we get here, label isn't defined. */ + return 0; +} + +static long +dollar_label_instance (long label) +{ + long *i; + + know ((dollar_labels != NULL) || (dollar_label_count == 0)); + + for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) + if (*i == label) + return (dollar_label_instances[i - dollar_labels]); + + /* If we get here, we haven't seen the label before. + Therefore its instance count is zero. */ + return 0; +} + +void +dollar_label_clear (void) +{ + memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count); +} + +#define DOLLAR_LABEL_BUMP_BY 10 + +void +define_dollar_label (long label) +{ + long *i; + + for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) + if (*i == label) + { + ++dollar_label_instances[i - dollar_labels]; + dollar_label_defines[i - dollar_labels] = 1; + return; + } + + /* If we get to here, we don't have label listed yet. */ + + if (dollar_labels == NULL) + { + dollar_labels = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long)); + dollar_label_instances = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long)); + dollar_label_defines = (char *) xmalloc (DOLLAR_LABEL_BUMP_BY); + dollar_label_max = DOLLAR_LABEL_BUMP_BY; + dollar_label_count = 0; + } + else if (dollar_label_count == dollar_label_max) + { + dollar_label_max += DOLLAR_LABEL_BUMP_BY; + dollar_labels = (long *) xrealloc ((char *) dollar_labels, + dollar_label_max * sizeof (long)); + dollar_label_instances = (long *) xrealloc ((char *) dollar_label_instances, + dollar_label_max * sizeof (long)); + dollar_label_defines = (char *) xrealloc (dollar_label_defines, dollar_label_max); + } /* if we needed to grow */ + + dollar_labels[dollar_label_count] = label; + dollar_label_instances[dollar_label_count] = 1; + dollar_label_defines[dollar_label_count] = 1; + ++dollar_label_count; +} + +/* Caller must copy returned name: we re-use the area for the next name. + + The mth occurence of label n: is turned into the symbol "Ln^Am" + where n is the label number and m is the instance number. "L" makes + it a label discarded unless debugging and "^A"('\1') ensures no + ordinary symbol SHOULD get the same name as a local label + symbol. The first "4:" is "L4^A1" - the m numbers begin at 1. + + fb labels get the same treatment, except that ^B is used in place + of ^A. */ + +char * /* Return local label name. */ +dollar_label_name (register long n, /* we just saw "n$:" : n a number. */ + register int augend /* 0 for current instance, 1 for new instance. */) +{ + long i; + /* Returned to caller, then copied. Used for created names ("4f"). */ + static char symbol_name_build[24]; + register char *p; + register char *q; + char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */ + + know (n >= 0); + know (augend == 0 || augend == 1); + p = symbol_name_build; +#ifdef LOCAL_LABEL_PREFIX + *p++ = LOCAL_LABEL_PREFIX; +#endif + *p++ = 'L'; + + /* Next code just does sprintf( {}, "%d", n); */ + /* Label number. */ + q = symbol_name_temporary; + for (*q++ = 0, i = n; i; ++q) + { + *q = i % 10 + '0'; + i /= 10; + } + while ((*p = *--q) != '\0') + ++p; + + *p++ = DOLLAR_LABEL_CHAR; /* ^A */ + + /* Instance number. */ + q = symbol_name_temporary; + for (*q++ = 0, i = dollar_label_instance (n) + augend; i; ++q) + { + *q = i % 10 + '0'; + i /= 10; + } + while ((*p++ = *--q) != '\0'); + + /* The label, as a '\0' ended string, starts at symbol_name_build. */ + return symbol_name_build; +} + +/* Somebody else's idea of local labels. They are made by "n:" where n + is any decimal digit. Refer to them with + "nb" for previous (backward) n: + or "nf" for next (forward) n:. + + We do a little better and let n be any number, not just a single digit, but + since the other guy's assembler only does ten, we treat the first ten + specially. + + Like someone else's assembler, we have one set of local label counters for + entire assembly, not one set per (sub)segment like in most assemblers. This + implies that one can refer to a label in another segment, and indeed some + crufty compilers have done just that. + + Since there could be a LOT of these things, treat them as a sparse + array. */ + +#define FB_LABEL_SPECIAL (10) + +static long fb_low_counter[FB_LABEL_SPECIAL]; +static long *fb_labels; +static long *fb_label_instances; +static long fb_label_count; +static long fb_label_max; + +/* This must be more than FB_LABEL_SPECIAL. */ +#define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6) + +static void +fb_label_init (void) +{ + memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter)); +} + +/* Add one to the instance number of this fb label. */ + +void +fb_label_instance_inc (long label) +{ + long *i; + + if ((unsigned long) label < FB_LABEL_SPECIAL) + { + ++fb_low_counter[label]; + return; + } + + if (fb_labels != NULL) + { + for (i = fb_labels + FB_LABEL_SPECIAL; + i < fb_labels + fb_label_count; ++i) + { + if (*i == label) + { + ++fb_label_instances[i - fb_labels]; + return; + } /* if we find it */ + } /* for each existing label */ + } + + /* If we get to here, we don't have label listed yet. */ + + if (fb_labels == NULL) + { + fb_labels = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long)); + fb_label_instances = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long)); + fb_label_max = FB_LABEL_BUMP_BY; + fb_label_count = FB_LABEL_SPECIAL; + + } + else if (fb_label_count == fb_label_max) + { + fb_label_max += FB_LABEL_BUMP_BY; + fb_labels = (long *) xrealloc ((char *) fb_labels, + fb_label_max * sizeof (long)); + fb_label_instances = (long *) xrealloc ((char *) fb_label_instances, + fb_label_max * sizeof (long)); + } /* if we needed to grow */ + + fb_labels[fb_label_count] = label; + fb_label_instances[fb_label_count] = 1; + ++fb_label_count; +} + +static long +fb_label_instance (long label) +{ + long *i; + + if ((unsigned long) label < FB_LABEL_SPECIAL) + { + return (fb_low_counter[label]); + } + + if (fb_labels != NULL) + { + for (i = fb_labels + FB_LABEL_SPECIAL; + i < fb_labels + fb_label_count; ++i) + { + if (*i == label) + { + return (fb_label_instances[i - fb_labels]); + } /* if we find it */ + } /* for each existing label */ + } + + /* We didn't find the label, so this must be a reference to the + first instance. */ + return 0; +} + +/* Caller must copy returned name: we re-use the area for the next name. + + The mth occurence of label n: is turned into the symbol "Ln^Bm" + where n is the label number and m is the instance number. "L" makes + it a label discarded unless debugging and "^B"('\2') ensures no + ordinary symbol SHOULD get the same name as a local label + symbol. The first "4:" is "L4^B1" - the m numbers begin at 1. + + dollar labels get the same treatment, except that ^A is used in + place of ^B. */ + +char * /* Return local label name. */ +fb_label_name (long n, /* We just saw "n:", "nf" or "nb" : n a number. */ + long augend /* 0 for nb, 1 for n:, nf. */) +{ + long i; + /* Returned to caller, then copied. Used for created names ("4f"). */ + static char symbol_name_build[24]; + register char *p; + register char *q; + char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */ + + know (n >= 0); +#ifdef TC_MMIX + know ((unsigned long) augend <= 2 /* See mmix_fb_label. */); +#else + know ((unsigned long) augend <= 1); +#endif + p = symbol_name_build; +#ifdef LOCAL_LABEL_PREFIX + *p++ = LOCAL_LABEL_PREFIX; +#endif + *p++ = 'L'; + + /* Next code just does sprintf( {}, "%d", n); */ + /* Label number. */ + q = symbol_name_temporary; + for (*q++ = 0, i = n; i; ++q) + { + *q = i % 10 + '0'; + i /= 10; + } + while ((*p = *--q) != '\0') + ++p; + + *p++ = LOCAL_LABEL_CHAR; /* ^B */ + + /* Instance number. */ + q = symbol_name_temporary; + for (*q++ = 0, i = fb_label_instance (n) + augend; i; ++q) + { + *q = i % 10 + '0'; + i /= 10; + } + while ((*p++ = *--q) != '\0'); + + /* The label, as a '\0' ended string, starts at symbol_name_build. */ + return (symbol_name_build); +} + +/* Decode name that may have been generated by foo_label_name() above. + If the name wasn't generated by foo_label_name(), then return it + unaltered. This is used for error messages. */ + +char * +decode_local_label_name (char *s) +{ + char *p; + char *symbol_decode; + int label_number; + int instance_number; + char *type; + const char *message_format; + int lindex = 0; + +#ifdef LOCAL_LABEL_PREFIX + if (s[lindex] == LOCAL_LABEL_PREFIX) + ++lindex; +#endif + + if (s[lindex] != 'L') + return s; + + for (label_number = 0, p = s + lindex + 1; ISDIGIT (*p); ++p) + label_number = (10 * label_number) + *p - '0'; + + if (*p == DOLLAR_LABEL_CHAR) + type = "dollar"; + else if (*p == LOCAL_LABEL_CHAR) + type = "fb"; + else + return s; + + for (instance_number = 0, p++; ISDIGIT (*p); ++p) + instance_number = (10 * instance_number) + *p - '0'; + + message_format = _("\"%d\" (instance number %d of a %s label)"); + symbol_decode = (char *) obstack_alloc (¬es, strlen (message_format) + 30); + sprintf (symbol_decode, message_format, label_number, instance_number, type); + + return symbol_decode; +} + +/* Get the value of a symbol. */ + +valueT +S_GET_VALUE (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return resolve_symbol_value (s); + + if (!s->sy_flags.sy_resolved) + { + valueT val = resolve_symbol_value (s); + if (!finalize_syms) + return val; + } + if (S_IS_WEAKREFR (s)) + return S_GET_VALUE (s->sy_value.X_add_symbol); + + if (s->sy_value.X_op != O_constant) + { + if (! s->sy_flags.sy_resolved + || s->sy_value.X_op != O_symbol + || (S_IS_DEFINED (s) && ! S_IS_COMMON (s))) + as_bad (_("attempt to get value of unresolved symbol `%s'"), + S_GET_NAME (s)); + } + return (valueT) s->sy_value.X_add_number; +} + +/* Set the value of a symbol. */ + +void +S_SET_VALUE (symbolS *s, valueT val) +{ + if (LOCAL_SYMBOL_CHECK (s)) + { + ((struct local_symbol *) s)->lsy_value = val; + return; + } + + s->sy_value.X_op = O_constant; + s->sy_value.X_add_number = (offsetT) val; + s->sy_value.X_unsigned = 0; + S_CLEAR_WEAKREFR (s); +} + +void +copy_symbol_attributes (symbolS *dest, symbolS *src) +{ + if (LOCAL_SYMBOL_CHECK (dest)) + dest = local_symbol_convert ((struct local_symbol *) dest); + if (LOCAL_SYMBOL_CHECK (src)) + src = local_symbol_convert ((struct local_symbol *) src); + + /* In an expression, transfer the settings of these flags. + The user can override later, of course. */ +#define COPIED_SYMFLAGS (BSF_FUNCTION | BSF_OBJECT \ + | BSF_GNU_INDIRECT_FUNCTION) + dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS; + +#ifdef OBJ_COPY_SYMBOL_ATTRIBUTES + OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src); +#endif + +#ifdef TC_COPY_SYMBOL_ATTRIBUTES + TC_COPY_SYMBOL_ATTRIBUTES (dest, src); +#endif +} + +int +S_IS_FUNCTION (symbolS *s) +{ + flagword flags; + + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + + flags = s->bsym->flags; + + return (flags & BSF_FUNCTION) != 0; +} + +int +S_IS_EXTERNAL (symbolS *s) +{ + flagword flags; + + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + + flags = s->bsym->flags; + + /* Sanity check. */ + if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL)) + abort (); + + return (flags & BSF_GLOBAL) != 0; +} + +int +S_IS_WEAK (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + /* Conceptually, a weakrefr is weak if the referenced symbol is. We + could probably handle a WEAKREFR as always weak though. E.g., if + the referenced symbol has lost its weak status, there's no reason + to keep handling the weakrefr as if it was weak. */ + if (S_IS_WEAKREFR (s)) + return S_IS_WEAK (s->sy_value.X_add_symbol); + return (s->bsym->flags & BSF_WEAK) != 0; +} + +int +S_IS_WEAKREFR (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_flags.sy_weakrefr != 0; +} + +int +S_IS_WEAKREFD (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_flags.sy_weakrefd != 0; +} + +int +S_IS_COMMON (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return bfd_is_com_section (s->bsym->section); +} + +int +S_IS_DEFINED (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return ((struct local_symbol *) s)->lsy_section != undefined_section; + return s->bsym->section != undefined_section; +} + + +#ifndef EXTERN_FORCE_RELOC +#define EXTERN_FORCE_RELOC IS_ELF +#endif + +/* Return true for symbols that should not be reduced to section + symbols or eliminated from expressions, because they may be + overridden by the linker. */ +int +S_FORCE_RELOC (symbolS *s, int strict) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return ((struct local_symbol *) s)->lsy_section == undefined_section; + + return ((strict + && ((s->bsym->flags & BSF_WEAK) != 0 + || (EXTERN_FORCE_RELOC + && (s->bsym->flags & BSF_GLOBAL) != 0))) + || (s->bsym->flags & BSF_GNU_INDIRECT_FUNCTION) != 0 + || s->bsym->section == undefined_section + || bfd_is_com_section (s->bsym->section)); +} + +int +S_IS_DEBUG (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + if (s->bsym->flags & BSF_DEBUGGING) + return 1; + return 0; +} + +int +S_IS_LOCAL (symbolS *s) +{ + flagword flags; + const char *name; + + if (LOCAL_SYMBOL_CHECK (s)) + return 1; + + flags = s->bsym->flags; + + /* Sanity check. */ + if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL)) + abort (); + + if (bfd_get_section (s->bsym) == reg_section) + return 1; + + if (flag_strip_local_absolute + /* Keep BSF_FILE symbols in order to allow debuggers to identify + the source file even when the object file is stripped. */ + && (flags & (BSF_GLOBAL | BSF_FILE)) == 0 + && bfd_get_section (s->bsym) == absolute_section) + return 1; + + name = S_GET_NAME (s); + return (name != NULL + && ! S_IS_DEBUG (s) + && (strchr (name, DOLLAR_LABEL_CHAR) + || strchr (name, LOCAL_LABEL_CHAR) + || TC_LABEL_IS_LOCAL (name) + || (! flag_keep_locals + && (bfd_is_local_label (stdoutput, s->bsym) + || (flag_mri + && name[0] == '?' + && name[1] == '?'))))); +} + +int +S_IS_STABD (symbolS *s) +{ + return S_GET_NAME (s) == 0; +} + +int +S_CAN_BE_REDEFINED (const symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return (local_symbol_get_frag ((struct local_symbol *) s) + == &predefined_address_frag); + /* Permit register names to be redefined. */ + return s->bsym->section == reg_section; +} + +int +S_IS_VOLATILE (const symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_flags.sy_volatile; +} + +int +S_IS_FORWARD_REF (const symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_flags.sy_forward_ref; +} + +const char * +S_GET_NAME (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return ((struct local_symbol *) s)->lsy_name; + return s->bsym->name; +} + +segT +S_GET_SEGMENT (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return ((struct local_symbol *) s)->lsy_section; + return s->bsym->section; +} + +void +S_SET_SEGMENT (symbolS *s, segT seg) +{ + /* Don't reassign section symbols. The direct reason is to prevent seg + faults assigning back to const global symbols such as *ABS*, but it + shouldn't happen anyway. */ + + if (LOCAL_SYMBOL_CHECK (s)) + { + if (seg == reg_section) + s = local_symbol_convert ((struct local_symbol *) s); + else + { + ((struct local_symbol *) s)->lsy_section = seg; + return; + } + } + + if (s->bsym->flags & BSF_SECTION_SYM) + { + if (s->bsym->section != seg) + abort (); + } + else + s->bsym->section = seg; +} + +void +S_SET_EXTERNAL (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + if ((s->bsym->flags & BSF_WEAK) != 0) + { + /* Let .weak override .global. */ + return; + } + if (s->bsym->flags & BSF_SECTION_SYM) + { + char * file; + unsigned int line; + + /* Do not reassign section symbols. */ + as_where (& file, & line); + as_warn_where (file, line, + _("section symbols are already global")); + return; + } +#ifndef TC_GLOBAL_REGISTER_SYMBOL_OK + if (S_GET_SEGMENT (s) == reg_section) + { + as_bad ("can't make register symbol `%s' global", + S_GET_NAME (s)); + return; + } +#endif + s->bsym->flags |= BSF_GLOBAL; + s->bsym->flags &= ~(BSF_LOCAL | BSF_WEAK); + +#ifdef TE_PE + if (! an_external_name && S_GET_NAME(s)[0] != '.') + an_external_name = S_GET_NAME (s); +#endif +} + +void +S_CLEAR_EXTERNAL (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + if ((s->bsym->flags & BSF_WEAK) != 0) + { + /* Let .weak override. */ + return; + } + s->bsym->flags |= BSF_LOCAL; + s->bsym->flags &= ~(BSF_GLOBAL | BSF_WEAK); +} + +void +S_SET_WEAK (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); +#ifdef obj_set_weak_hook + obj_set_weak_hook (s); +#endif + s->bsym->flags |= BSF_WEAK; + s->bsym->flags &= ~(BSF_GLOBAL | BSF_LOCAL); +} + +void +S_SET_WEAKREFR (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_flags.sy_weakrefr = 1; + /* If the alias was already used, make sure we mark the target as + used as well, otherwise it might be dropped from the symbol + table. This may have unintended side effects if the alias is + later redirected to another symbol, such as keeping the unused + previous target in the symbol table. Since it will be weak, it's + not a big deal. */ + if (s->sy_flags.sy_used) + symbol_mark_used (s->sy_value.X_add_symbol); +} + +void +S_CLEAR_WEAKREFR (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + s->sy_flags.sy_weakrefr = 0; +} + +void +S_SET_WEAKREFD (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_flags.sy_weakrefd = 1; + S_SET_WEAK (s); +} + +void +S_CLEAR_WEAKREFD (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + if (s->sy_flags.sy_weakrefd) + { + s->sy_flags.sy_weakrefd = 0; + /* If a weakref target symbol is weak, then it was never + referenced directly before, not even in a .global directive, + so decay it to local. If it remains undefined, it will be + later turned into a global, like any other undefined + symbol. */ + if (s->bsym->flags & BSF_WEAK) + { +#ifdef obj_clear_weak_hook + obj_clear_weak_hook (s); +#endif + s->bsym->flags &= ~BSF_WEAK; + s->bsym->flags |= BSF_LOCAL; + } + } +} + +void +S_SET_THREAD_LOCAL (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + if (bfd_is_com_section (s->bsym->section) + && (s->bsym->flags & BSF_THREAD_LOCAL) != 0) + return; + s->bsym->flags |= BSF_THREAD_LOCAL; + if ((s->bsym->flags & BSF_FUNCTION) != 0) + as_bad (_("Accessing function `%s' as thread-local object"), + S_GET_NAME (s)); + else if (! bfd_is_und_section (s->bsym->section) + && (s->bsym->section->flags & SEC_THREAD_LOCAL) == 0) + as_bad (_("Accessing `%s' as thread-local object"), + S_GET_NAME (s)); +} + +void +S_SET_NAME (symbolS *s, const char *name) +{ + if (LOCAL_SYMBOL_CHECK (s)) + { + ((struct local_symbol *) s)->lsy_name = name; + return; + } + s->bsym->name = name; +} + +void +S_SET_VOLATILE (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_flags.sy_volatile = 1; +} + +void +S_CLEAR_VOLATILE (symbolS *s) +{ + if (!LOCAL_SYMBOL_CHECK (s)) + s->sy_flags.sy_volatile = 0; +} + +void +S_SET_FORWARD_REF (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_flags.sy_forward_ref = 1; +} + +/* Return the previous symbol in a chain. */ + +symbolS * +symbol_previous (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + abort (); + return s->sy_previous; +} + +/* Return the next symbol in a chain. */ + +symbolS * +symbol_next (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + abort (); + return s->sy_next; +} + +/* Return a pointer to the value of a symbol as an expression. */ + +expressionS * +symbol_get_value_expression (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + return &s->sy_value; +} + +/* Set the value of a symbol to an expression. */ + +void +symbol_set_value_expression (symbolS *s, const expressionS *exp) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_value = *exp; + S_CLEAR_WEAKREFR (s); +} + +/* Return whether 2 symbols are the same. */ + +int +symbol_same_p (symbolS *s1, symbolS *s2) +{ + if (s1->sy_flags.sy_local_symbol + && local_symbol_converted_p ((struct local_symbol *) s1)) + s1 = local_symbol_get_real_symbol ((struct local_symbol *) s1); + if (s2->sy_flags.sy_local_symbol + && local_symbol_converted_p ((struct local_symbol *) s2)) + s2 = local_symbol_get_real_symbol ((struct local_symbol *) s2); + return s1 == s2; +} + +/* Return a pointer to the X_add_number component of a symbol. */ + +offsetT * +symbol_X_add_number (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return (offsetT *) &((struct local_symbol *) s)->lsy_value; + + return &s->sy_value.X_add_number; +} + +/* Set the value of SYM to the current position in the current segment. */ + +void +symbol_set_value_now (symbolS *sym) +{ + S_SET_SEGMENT (sym, now_seg); + S_SET_VALUE (sym, frag_now_fix ()); + symbol_set_frag (sym, frag_now); +} + +/* Set the frag of a symbol. */ + +void +symbol_set_frag (symbolS *s, fragS *f) +{ + if (LOCAL_SYMBOL_CHECK (s)) + { + local_symbol_set_frag ((struct local_symbol *) s, f); + return; + } + s->sy_frag = f; + S_CLEAR_WEAKREFR (s); +} + +/* Return the frag of a symbol. */ + +fragS * +symbol_get_frag (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return local_symbol_get_frag ((struct local_symbol *) s); + return s->sy_frag; +} + +/* Mark a symbol as having been used. */ + +void +symbol_mark_used (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + s->sy_flags.sy_used = 1; + if (S_IS_WEAKREFR (s)) + symbol_mark_used (s->sy_value.X_add_symbol); +} + +/* Clear the mark of whether a symbol has been used. */ + +void +symbol_clear_used (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_flags.sy_used = 0; +} + +/* Return whether a symbol has been used. */ + +int +symbol_used_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 1; + return s->sy_flags.sy_used; +} + +/* Mark a symbol as having been used in a reloc. */ + +void +symbol_mark_used_in_reloc (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_flags.sy_used_in_reloc = 1; +} + +/* Clear the mark of whether a symbol has been used in a reloc. */ + +void +symbol_clear_used_in_reloc (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + s->sy_flags.sy_used_in_reloc = 0; +} + +/* Return whether a symbol has been used in a reloc. */ + +int +symbol_used_in_reloc_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_flags.sy_used_in_reloc; +} + +/* Mark a symbol as an MRI common symbol. */ + +void +symbol_mark_mri_common (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_flags.sy_mri_common = 1; +} + +/* Clear the mark of whether a symbol is an MRI common symbol. */ + +void +symbol_clear_mri_common (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + s->sy_flags.sy_mri_common = 0; +} + +/* Return whether a symbol is an MRI common symbol. */ + +int +symbol_mri_common_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_flags.sy_mri_common; +} + +/* Mark a symbol as having been written. */ + +void +symbol_mark_written (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + s->sy_flags.sy_written = 1; +} + +/* Clear the mark of whether a symbol has been written. */ + +void +symbol_clear_written (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return; + s->sy_flags.sy_written = 0; +} + +/* Return whether a symbol has been written. */ + +int +symbol_written_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_flags.sy_written; +} + +/* Mark a symbol has having been resolved. */ + +void +symbol_mark_resolved (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + { + local_symbol_mark_resolved ((struct local_symbol *) s); + return; + } + s->sy_flags.sy_resolved = 1; +} + +/* Return whether a symbol has been resolved. */ + +int +symbol_resolved_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return local_symbol_resolved_p ((struct local_symbol *) s); + return s->sy_flags.sy_resolved; +} + +/* Return whether a symbol is a section symbol. */ + +int +symbol_section_p (symbolS *s ATTRIBUTE_UNUSED) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return (s->bsym->flags & BSF_SECTION_SYM) != 0; +} + +/* Return whether a symbol is equated to another symbol. */ + +int +symbol_equated_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_value.X_op == O_symbol; +} + +/* Return whether a symbol is equated to another symbol, and should be + treated specially when writing out relocs. */ + +int +symbol_equated_reloc_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + /* X_op_symbol, normally not used for O_symbol, is set by + resolve_symbol_value to flag expression syms that have been + equated. */ + return (s->sy_value.X_op == O_symbol +#if defined (OBJ_COFF) && defined (TE_PE) + && ! S_IS_WEAK (s) +#endif + && ((s->sy_flags.sy_resolved && s->sy_value.X_op_symbol != NULL) + || ! S_IS_DEFINED (s) + || S_IS_COMMON (s))); +} + +/* Return whether a symbol has a constant value. */ + +int +symbol_constant_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 1; + return s->sy_value.X_op == O_constant; +} + +/* Return whether a symbol was cloned and thus removed from the global + symbol list. */ + +int +symbol_shadow_p (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + return 0; + return s->sy_next == s; +} + +/* Return the BFD symbol for a symbol. */ + +asymbol * +symbol_get_bfdsym (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + return s->bsym; +} + +/* Set the BFD symbol for a symbol. */ + +void +symbol_set_bfdsym (symbolS *s, asymbol *bsym) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + /* Usually, it is harmless to reset a symbol to a BFD section + symbol. For example, obj_elf_change_section sets the BFD symbol + of an old symbol with the newly created section symbol. But when + we have multiple sections with the same name, the newly created + section may have the same name as an old section. We check if the + old symbol has been already marked as a section symbol before + resetting it. */ + if ((s->bsym->flags & BSF_SECTION_SYM) == 0) + s->bsym = bsym; + /* else XXX - What do we do now ? */ +} + +#ifdef OBJ_SYMFIELD_TYPE + +/* Get a pointer to the object format information for a symbol. */ + +OBJ_SYMFIELD_TYPE * +symbol_get_obj (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + return &s->sy_obj; +} + +/* Set the object format information for a symbol. */ + +void +symbol_set_obj (symbolS *s, OBJ_SYMFIELD_TYPE *o) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_obj = *o; +} + +#endif /* OBJ_SYMFIELD_TYPE */ + +#ifdef TC_SYMFIELD_TYPE + +/* Get a pointer to the processor information for a symbol. */ + +TC_SYMFIELD_TYPE * +symbol_get_tc (symbolS *s) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + return &s->sy_tc; +} + +/* Set the processor information for a symbol. */ + +void +symbol_set_tc (symbolS *s, TC_SYMFIELD_TYPE *o) +{ + if (LOCAL_SYMBOL_CHECK (s)) + s = local_symbol_convert ((struct local_symbol *) s); + s->sy_tc = *o; +} + +#endif /* TC_SYMFIELD_TYPE */ + +void +symbol_begin (void) +{ + symbol_lastP = NULL; + symbol_rootP = NULL; /* In case we have 0 symbols (!!) */ + sy_hash = hash_new (); + local_hash = hash_new (); + + memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol)); +#if defined (EMIT_SECTION_SYMBOLS) || !defined (RELOC_REQUIRES_SYMBOL) + abs_symbol.bsym = bfd_abs_section_ptr->symbol; +#endif + abs_symbol.sy_value.X_op = O_constant; + abs_symbol.sy_frag = &zero_address_frag; + + if (LOCAL_LABELS_FB) + fb_label_init (); +} + +void +dot_symbol_init (void) +{ + dot_symbol.bsym = bfd_make_empty_symbol (stdoutput); + if (dot_symbol.bsym == NULL) + as_fatal ("bfd_make_empty_symbol: %s", bfd_errmsg (bfd_get_error ())); + dot_symbol.bsym->name = "."; + dot_symbol.sy_flags.sy_forward_ref = 1; + dot_symbol.sy_value.X_op = O_constant; +} + +int indent_level; + +/* Maximum indent level. + Available for modification inside a gdb session. */ +static int max_indent_level = 8; + +void +print_symbol_value_1 (FILE *file, symbolS *sym) +{ + const char *name = S_GET_NAME (sym); + if (!name || !name[0]) + name = "(unnamed)"; + fprintf (file, "sym "); + fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym)); + fprintf (file, " %s", name); + + if (LOCAL_SYMBOL_CHECK (sym)) + { + struct local_symbol *locsym = (struct local_symbol *) sym; + + if (local_symbol_get_frag (locsym) != & zero_address_frag + && local_symbol_get_frag (locsym) != NULL) + { + fprintf (file, " frag "); + fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) local_symbol_get_frag (locsym))); + } + if (local_symbol_resolved_p (locsym)) + fprintf (file, " resolved"); + fprintf (file, " local"); + } + else + { + if (sym->sy_frag != &zero_address_frag) + { + fprintf (file, " frag "); + fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym->sy_frag)); + } + if (sym->sy_flags.sy_written) + fprintf (file, " written"); + if (sym->sy_flags.sy_resolved) + fprintf (file, " resolved"); + else if (sym->sy_flags.sy_resolving) + fprintf (file, " resolving"); + if (sym->sy_flags.sy_used_in_reloc) + fprintf (file, " used-in-reloc"); + if (sym->sy_flags.sy_used) + fprintf (file, " used"); + if (S_IS_LOCAL (sym)) + fprintf (file, " local"); + if (S_IS_EXTERNAL (sym)) + fprintf (file, " extern"); + if (S_IS_WEAK (sym)) + fprintf (file, " weak"); + if (S_IS_DEBUG (sym)) + fprintf (file, " debug"); + if (S_IS_DEFINED (sym)) + fprintf (file, " defined"); + } + if (S_IS_WEAKREFR (sym)) + fprintf (file, " weakrefr"); + if (S_IS_WEAKREFD (sym)) + fprintf (file, " weakrefd"); + fprintf (file, " %s", segment_name (S_GET_SEGMENT (sym))); + if (symbol_resolved_p (sym)) + { + segT s = S_GET_SEGMENT (sym); + + if (s != undefined_section + && s != expr_section) + fprintf (file, " %lx", (unsigned long) S_GET_VALUE (sym)); + } + else if (indent_level < max_indent_level + && S_GET_SEGMENT (sym) != undefined_section) + { + indent_level++; + fprintf (file, "\n%*s<", indent_level * 4, ""); + if (LOCAL_SYMBOL_CHECK (sym)) + fprintf (file, "constant %lx", + (unsigned long) ((struct local_symbol *) sym)->lsy_value); + else + print_expr_1 (file, &sym->sy_value); + fprintf (file, ">"); + indent_level--; + } + fflush (file); +} + +void +print_symbol_value (symbolS *sym) +{ + indent_level = 0; + print_symbol_value_1 (stderr, sym); + fprintf (stderr, "\n"); +} + +static void +print_binary (FILE *file, const char *name, expressionS *exp) +{ + indent_level++; + fprintf (file, "%s\n%*s<", name, indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_add_symbol); + fprintf (file, ">\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_op_symbol); + fprintf (file, ">"); + indent_level--; +} + +void +print_expr_1 (FILE *file, expressionS *exp) +{ + fprintf (file, "expr "); + fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) exp)); + fprintf (file, " "); + switch (exp->X_op) + { + case O_illegal: + fprintf (file, "illegal"); + break; + case O_absent: + fprintf (file, "absent"); + break; + case O_constant: + fprintf (file, "constant %lx", (unsigned long) exp->X_add_number); + break; + case O_symbol: + indent_level++; + fprintf (file, "symbol\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_add_symbol); + fprintf (file, ">"); + maybe_print_addnum: + if (exp->X_add_number) + fprintf (file, "\n%*s%lx", indent_level * 4, "", + (unsigned long) exp->X_add_number); + indent_level--; + break; + case O_register: + fprintf (file, "register #%d", (int) exp->X_add_number); + break; + case O_big: + fprintf (file, "big"); + break; + case O_uminus: + fprintf (file, "uminus -<"); + indent_level++; + print_symbol_value_1 (file, exp->X_add_symbol); + fprintf (file, ">"); + goto maybe_print_addnum; + case O_bit_not: + fprintf (file, "bit_not"); + break; + case O_multiply: + print_binary (file, "multiply", exp); + break; + case O_divide: + print_binary (file, "divide", exp); + break; + case O_modulus: + print_binary (file, "modulus", exp); + break; + case O_left_shift: + print_binary (file, "lshift", exp); + break; + case O_right_shift: + print_binary (file, "rshift", exp); + break; + case O_bit_inclusive_or: + print_binary (file, "bit_ior", exp); + break; + case O_bit_exclusive_or: + print_binary (file, "bit_xor", exp); + break; + case O_bit_and: + print_binary (file, "bit_and", exp); + break; + case O_eq: + print_binary (file, "eq", exp); + break; + case O_ne: + print_binary (file, "ne", exp); + break; + case O_lt: + print_binary (file, "lt", exp); + break; + case O_le: + print_binary (file, "le", exp); + break; + case O_ge: + print_binary (file, "ge", exp); + break; + case O_gt: + print_binary (file, "gt", exp); + break; + case O_logical_and: + print_binary (file, "logical_and", exp); + break; + case O_logical_or: + print_binary (file, "logical_or", exp); + break; + case O_add: + indent_level++; + fprintf (file, "add\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_add_symbol); + fprintf (file, ">\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_op_symbol); + fprintf (file, ">"); + goto maybe_print_addnum; + case O_subtract: + indent_level++; + fprintf (file, "subtract\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_add_symbol); + fprintf (file, ">\n%*s<", indent_level * 4, ""); + print_symbol_value_1 (file, exp->X_op_symbol); + fprintf (file, ">"); + goto maybe_print_addnum; + default: + fprintf (file, "{unknown opcode %d}", (int) exp->X_op); + break; + } + fflush (stdout); +} + +void +print_expr (expressionS *exp) +{ + print_expr_1 (stderr, exp); + fprintf (stderr, "\n"); +} + +void +symbol_print_statistics (FILE *file) +{ + hash_print_statistics (file, "symbol table", sy_hash); + hash_print_statistics (file, "mini local symbol table", local_hash); + fprintf (file, "%lu mini local symbols created, %lu converted\n", + local_symbol_count, local_symbol_conversion_count); +} + +#ifdef OBJ_COMPLEX_RELC + +/* Convert given symbol to a new complex-relocation symbol name. This + may be a recursive function, since it might be called for non-leaf + nodes (plain symbols) in the expression tree. The caller owns the + returning string, so should free it eventually. Errors are + indicated via as_bad and a NULL return value. The given symbol + is marked with sy_used_in_reloc. */ + +char * +symbol_relc_make_sym (symbolS * sym) +{ + char * terminal = NULL; + const char * sname; + char typetag; + int sname_len; + + gas_assert (sym != NULL); + + /* Recurse to symbol_relc_make_expr if this symbol + is defined as an expression or a plain value. */ + if ( S_GET_SEGMENT (sym) == expr_section + || S_GET_SEGMENT (sym) == absolute_section) + return symbol_relc_make_expr (& sym->sy_value); + + /* This may be a "fake symbol" L0\001, referring to ".". + Write out a special null symbol to refer to this position. */ + if (! strcmp (S_GET_NAME (sym), FAKE_LABEL_NAME)) + return xstrdup ("."); + + /* We hope this is a plain leaf symbol. Construct the encoding + as {S,s}II...:CCCCCCC.... + where 'S'/'s' means section symbol / plain symbol + III is decimal for the symbol name length + CCC is the symbol name itself. */ + symbol_mark_used_in_reloc (sym); + + sname = S_GET_NAME (sym); + sname_len = strlen (sname); + typetag = symbol_section_p (sym) ? 'S' : 's'; + + terminal = xmalloc (1 /* S or s */ + + 8 /* sname_len in decimal */ + + 1 /* _ spacer */ + + sname_len /* name itself */ + + 1 /* \0 */ ); + + sprintf (terminal, "%c%d:%s", typetag, sname_len, sname); + return terminal; +} + +/* Convert given value to a new complex-relocation symbol name. This + is a non-recursive function, since it is be called for leaf nodes + (plain values) in the expression tree. The caller owns the + returning string, so should free() it eventually. No errors. */ + +char * +symbol_relc_make_value (offsetT val) +{ + char * terminal = xmalloc (28); /* Enough for long long. */ + + terminal[0] = '#'; + bfd_sprintf_vma (stdoutput, terminal + 1, val); + return terminal; +} + +/* Convert given expression to a new complex-relocation symbol name. + This is a recursive function, since it traverses the entire given + expression tree. The caller owns the returning string, so should + free() it eventually. Errors are indicated via as_bad() and a NULL + return value. */ + +char * +symbol_relc_make_expr (expressionS * exp) +{ + char * opstr = NULL; /* Operator prefix string. */ + int arity = 0; /* Arity of this operator. */ + char * operands[3]; /* Up to three operands. */ + char * concat_string = NULL; + + operands[0] = operands[1] = operands[2] = NULL; + + gas_assert (exp != NULL); + + /* Match known operators -> fill in opstr, arity, operands[] and fall + through to construct subexpression fragments; may instead return + string directly for leaf nodes. */ + + /* See expr.h for the meaning of all these enums. Many operators + have an unnatural arity (X_add_number implicitly added). The + conversion logic expands them to explicit "+" subexpressions. */ + + switch (exp->X_op) + { + default: + as_bad ("Unknown expression operator (enum %d)", exp->X_op); + break; + + /* Leaf nodes. */ + case O_constant: + return symbol_relc_make_value (exp->X_add_number); + + case O_symbol: + if (exp->X_add_number) + { + arity = 2; + opstr = "+"; + operands[0] = symbol_relc_make_sym (exp->X_add_symbol); + operands[1] = symbol_relc_make_value (exp->X_add_number); + break; + } + else + return symbol_relc_make_sym (exp->X_add_symbol); + + /* Helper macros for nesting nodes. */ + +#define HANDLE_XADD_OPT1(str_) \ + if (exp->X_add_number) \ + { \ + arity = 2; \ + opstr = "+:" str_; \ + operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ + operands[1] = symbol_relc_make_value (exp->X_add_number); \ + break; \ + } \ + else \ + { \ + arity = 1; \ + opstr = str_; \ + operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ + } \ + break + +#define HANDLE_XADD_OPT2(str_) \ + if (exp->X_add_number) \ + { \ + arity = 3; \ + opstr = "+:" str_; \ + operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ + operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \ + operands[2] = symbol_relc_make_value (exp->X_add_number); \ + } \ + else \ + { \ + arity = 2; \ + opstr = str_; \ + operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ + operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \ + } \ + break + + /* Nesting nodes. */ + + case O_uminus: HANDLE_XADD_OPT1 ("0-"); + case O_bit_not: HANDLE_XADD_OPT1 ("~"); + case O_logical_not: HANDLE_XADD_OPT1 ("!"); + case O_multiply: HANDLE_XADD_OPT2 ("*"); + case O_divide: HANDLE_XADD_OPT2 ("/"); + case O_modulus: HANDLE_XADD_OPT2 ("%"); + case O_left_shift: HANDLE_XADD_OPT2 ("<<"); + case O_right_shift: HANDLE_XADD_OPT2 (">>"); + case O_bit_inclusive_or: HANDLE_XADD_OPT2 ("|"); + case O_bit_exclusive_or: HANDLE_XADD_OPT2 ("^"); + case O_bit_and: HANDLE_XADD_OPT2 ("&"); + case O_add: HANDLE_XADD_OPT2 ("+"); + case O_subtract: HANDLE_XADD_OPT2 ("-"); + case O_eq: HANDLE_XADD_OPT2 ("=="); + case O_ne: HANDLE_XADD_OPT2 ("!="); + case O_lt: HANDLE_XADD_OPT2 ("<"); + case O_le: HANDLE_XADD_OPT2 ("<="); + case O_ge: HANDLE_XADD_OPT2 (">="); + case O_gt: HANDLE_XADD_OPT2 (">"); + case O_logical_and: HANDLE_XADD_OPT2 ("&&"); + case O_logical_or: HANDLE_XADD_OPT2 ("||"); + } + + /* Validate & reject early. */ + if (arity >= 1 && ((operands[0] == NULL) || (strlen (operands[0]) == 0))) + opstr = NULL; + if (arity >= 2 && ((operands[1] == NULL) || (strlen (operands[1]) == 0))) + opstr = NULL; + if (arity >= 3 && ((operands[2] == NULL) || (strlen (operands[2]) == 0))) + opstr = NULL; + + if (opstr == NULL) + concat_string = NULL; + else + { + /* Allocate new string; include inter-operand padding gaps etc. */ + concat_string = xmalloc (strlen (opstr) + + 1 + + (arity >= 1 ? (strlen (operands[0]) + 1 ) : 0) + + (arity >= 2 ? (strlen (operands[1]) + 1 ) : 0) + + (arity >= 3 ? (strlen (operands[2]) + 0 ) : 0) + + 1); + gas_assert (concat_string != NULL); + + /* Format the thing. */ + sprintf (concat_string, + (arity == 0 ? "%s" : + arity == 1 ? "%s:%s" : + arity == 2 ? "%s:%s:%s" : + /* arity == 3 */ "%s:%s:%s:%s"), + opstr, operands[0], operands[1], operands[2]); + } + + /* Free operand strings (not opstr). */ + if (arity >= 1) xfree (operands[0]); + if (arity >= 2) xfree (operands[1]); + if (arity >= 3) xfree (operands[2]); + + return concat_string; +} + +#endif |